So, what exactly is 4D printing?

While 3D printing may have already captured our imagination, here's how the next step works
3d printing, 4D, 4D printing, What is 4D printing?
3d printing, 4D, 4D printing, What is 4D printing?
3d printing, 4D, 4D printing, What is 4D printing?
3d printing, 4D, 4D printing, What is 4D printing?
11May2015
Matt Pomroy